Is there an option to output the distribution of aerosol particulate sizes per cell with a DEVC, or 3D Slice?

[bwklein]

There is some interest in using amount and distribution of particulate sizes within the cell to determine how light passes through it.
Is this kind of information known within FDS data arrays and could it be dumped to DEVC or Slice data files?

[mcgratta]

All that sort of info is output via the PDPA device. There is a section in the User's Guide about it.

22.10.16 Detailed Spray Properties

[drjfloyd]

PDPDA device only works for PART. If you have AEROSOLs from SPEC, then you can output the species densities or mass fractions using SLCF or DEVC. If you just have the default SOOT from FDS (i.e. you don't specify a soot input other then a SOOT_YIELD on REAC), then there is no size distribution. It is only if you also define AEROSOL=T and set N_BINS > 1 along with minimum and maximum diameters to track. Then you can output the amount in each bin.

[bwklein]

Thank you, this is the use case with SPEC and AEROSOL=T.